The Building Leslie was walking slower than a drowsy turtle. He was holding Eric's coarse hand and trying to catch up to his hasty footsteps. Leslie did not care that his glasses would slide down the nose every so often. His eyes were keenly focused on an open book on his right hand. With every step, Eric was trying to keep his brother away from the traffic. Eric was also holding a basketball with his other hand and bouncing it on the ground occasionally. The boys—twelve and fifteen—always walked to school together.
Each morning, Leslie would read to his older brother or tell him the summary of what was going to be covered in his Reading class. Today, he was reading The Rocking Horse Winner. Leslie only had fifteen minutes before reaching the building that would separate him from his brother. To him, the building was a sign that he was still younger, weaker, and smaller than Eric. The building, on the other hand, freed Eric. He felt less like a big guy outwitted by his little brother and more like the basketball star of the high school. Till it was time to return home again, the boys lived their separate lives.

Which of these is true about Eric?
A. He is Leslie's character foil because he shows how vulnerable Leslie is.
B. He is a flat character because he keeps growing as the events unfold.
C. He is a dynamic character because he stays static throughout the story.
D. He is the antagonist because he acts more bravely in the story.